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Home >> Subaru >> 2011 >> Legacy Premium, Automatic CVT >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 7 (Engine Diagnostics (H4DOTC)) >> Diagnostic Procedure with Diagnostic Trouble Code (DTC) >> DTC P0024 Exhaust AVCS System 2 (Range/Performance) >> Trouble Symptom

DTC P0024 Exhaust AVCS System 2 (Range/Performance): Trouble Symptom

WARNING: This page is about a different variant/trim than selected.
Step Check Yes No
1 CHECK CURRENT DATA. 
  1. Start the engine and let it idle.
  2. Check the exhaust AVCS system operating angle using Subaru Select Monitor or general scan tool.
    NOTE:
    • Subaru Select Monitor

      For detailed operation procedures, refer to "READ CURRENT DATA FOR ENGINE". Refer to , SUBARU SELECT MONITOR .

    • General scan tool

      For detailed operation procedures, refer to the general scan tool operation manual.

Is the exhaust AVCS system operating angle approximately 0°? Go to step . Check the following item and repair or replace if necessary.
  • Oil pipe (clog)
  • Oil flow control solenoid valve (clog or dirt of oil routing, setting of spring)
  • Exhaust camshaft (dirt, damage of camshaft)
2 CHECK CURRENT DATA. 
  1. Drive with acceleration and deceleration at 80 km/h (50 MPH) or less.
    NOTE: Drive to an extent that the duty output of oil flow control solenoid valve increases.
  2. Measure the exhaust AVCS system operating angle and oil flow control solenoid valve duty output using Subaru Select Monitor or general scan tool.
    NOTE:
    • Subaru Select Monitor

      For detailed operation procedures, refer to "READ CURRENT DATA FOR ENGINE". Refer to , SUBARU SELECT MONITOR .

    • General scan tool

      For detailed operation procedures, refer to the general scan tool operation manual.

When the oil flow control solenoid valve duty output exceeds 10%, is the exhaust AVCS system operating angle approx. 0°? Check the following item and repair or replace if necessary.
  • Oil pipe (clog)
  • Oil flow control solenoid valve (clog or dirt of oil routing, setting of spring)
  • Exhaust camshaft (dirt, damage of camshaft)
Perform the following procedures, and clean the oil routing.
Replace the engine oil and idle the engine for 5 minutes, and then replace the oil filter and engine oil. Refer to ENGINE OIL REPLACEMENT, Engine Oil. Refer to ENGINE OIL FILTER Engine Oil Filter.